Generalized information on the distribution of Pseudoboletus parasiticus (Boletales, Basidiomycota) in Ukraine is provided. This fungus parasitizing basidiocarps of Scleroderma citrinum (also Boletales) is a rare and endangered species in Ukraine. Pseudoboletus parasiticus, as Boletus parasiticus, was included in the Red Data Book of Ukraine under the conservation status "Rare" and was reported from only four regions: Volyn, Transcarpathian, Lviv, and Rivne. This article significantly expands knowledge about the distribution of P. parasiticus in Ukraine. New records are added to the list of already known localities not only from the mentioned regions, but also from Zhytomyr, Ivano-Frankivsk, Kyiv, and Khmelnytsky regions (oblasts). Despite the largely increased number of localities, this fungus nevertheless is considered to be a rare species in Ukraine with a disjunctive range. Therefore, it is necessary to search for new localities, to protect the reported sites, to isolate it into a pure culture, and to carry out experiments on cultivation of P. parasiticus on fruit bodies of S. citrinum.
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